Blazhko effect in the Galactic bulge fundamental mode RR Lyrae
stars - II. Modulation shapes, amplitudes, and periods

J 2020

Blazhko effect in the Galactic bulge fundamental mode RR Lyrae stars - II. Modulation shapes, amplitudes, and periods

SKARKA, Marek; Z. PRUDIL a J. JURCSIK

Základní údaje

Originální název

Blazhko effect in the Galactic bulge fundamental mode RR Lyrae stars - II. Modulation shapes, amplitudes, and periods

Autoři

SKARKA, Marek; Z. PRUDIL a J. JURCSIK

Vydání

Monthly Notices of the Royal Astronomical Society, Malden, Wiley, 2020, 0035-8711

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.287

Kód RIV

RIV/00216224:14310/20:00116866

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.1093/mnras/staa673

UT WoS

000535885900096

EID Scopus

2-s2.0-85085360136

Klíčová slova anglicky

methods: data analysis; methods: statistical; techniques: photometric; stars: horizontal branch; stars: variables: RR Lyrae

Štítky

14312040, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 6. 11. 2020 13:09, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

The number of stars observed by the Optical Gravitational Lensing Experiment (OGLE) project in the Galactic bulge offers an invaluable chance to study RR Lyrae stars in a statistical manner. We used data of 3141 fundamental-mode RR Lyrae stars showing the Blazhko effect observed in OGLE-IV to investigate a possible connection between modulation amplitudes and periods, light curve, and pulsation characteristics. We found that there is no simple monotonic correlation between any combination of two parameters concerning the Blazhko and pulsation amplitudes, periods, and the shape of the light curves. There are only systematic limits. There is a bottom limit of the modulation period with respect to the pulsation period. We also found that the possible range of modulation amplitudes decreases with increasing pulsation period, which could point towards that the Blazhko effect is suppressed in cooler, larger, more luminous, and less metal abundant bulge RR Lyrae stars. Our investigation revealed that the distribution of the modulation periods can be described with two populations of stars with the mean modulation periods of 48 and 186 d. There is a certain region with a low density of the modulated stars, which we call the Blazhko valley, in the pulsation period-modulation period plane. Based on the similarity of the modulation envelopes, basically every star can be assigned to one of six morphological classes. The double modulation was found in 25 per cent of the studied stars. Only 6.3 per cent of modulated stars belong to the Oosterhoff group II.

Návaznosti

EF16_027/0008360, projekt VaV

Název: Postdoc@MUNI

Citovat

SKARKA, Marek; Z. PRUDIL a J. JURCSIK. Blazhko effect in the Galactic bulge fundamental mode RR Lyrae stars - II. Modulation shapes, amplitudes, and periods. Monthly Notices of the Royal Astronomical Society. Malden: Wiley, 2020, roč. 494, č. 1, s. 1237-1249. ISSN 0035-8711. Dostupné z: https://doi.org/10.1093/mnras/staa673.

@article{1689891,
   author = {Skarka, Marek and Prudil, Z. and Jurcsik, J.},
   article_location = {Malden},
   article_number = {1},
   doi = {https://doi.org/10.1093/mnras/staa673},
   keywords = {methods: data analysis; methods: statistical; techniques: photometric; stars: horizontal branch; stars: variables: RR Lyrae},
   language = {eng},
   issn = {0035-8711},
   journal = {Monthly Notices of the Royal Astronomical Society},
   title = {Blazhko effect in the Galactic bulge fundamental mode RR Lyrae stars - II. Modulation shapes, amplitudes, and periods},
   url = {https://doi.org/10.1093/mnras/staa673},
   volume = {494},
   year = {2020}
}

TY  - JOUR
ID  - 1689891
AU  - Skarka, Marek - Prudil, Z. - Jurcsik, J.
PY  - 2020
TI  - Blazhko effect in the Galactic bulge fundamental mode RR Lyrae stars - II. Modulation shapes, amplitudes, and periods
JF  - Monthly Notices of the Royal Astronomical Society
VL  - 494
IS  - 1
SP  - 1237-1249
EP  - 1237-1249
PB  - Wiley
SN  - 00358711
KW  - methods: data analysis
KW  - methods: statistical
KW  - techniques: photometric
KW  - stars: horizontal branch
KW  - stars: variables: RR Lyrae
UR  - https://doi.org/10.1093/mnras/staa673
L2  - https://doi.org/10.1093/mnras/staa673
N2  - The number of stars observed by the Optical Gravitational Lensing Experiment (OGLE) project in the Galactic bulge offers an invaluable chance to study RR Lyrae stars in a statistical manner. We used data of 3141 fundamental-mode RR Lyrae stars showing the Blazhko effect observed in OGLE-IV to investigate a possible connection between modulation amplitudes and periods, light curve, and pulsation characteristics. We found that there is no simple monotonic correlation between any combination of two parameters concerning the Blazhko and pulsation amplitudes, periods, and the shape of the light curves. There are only systematic limits. There is a bottom limit of the modulation period with respect to the pulsation period. We also found that the possible range of modulation amplitudes decreases with increasing pulsation period, which could point towards that the Blazhko effect is suppressed in cooler, larger, more luminous, and less metal abundant bulge RR Lyrae stars. Our investigation revealed that the distribution of the modulation periods can be described with two populations of stars with the mean modulation periods of 48 and 186 d. There is a certain region with a low density of the modulated stars, which we call the Blazhko valley, in the pulsation period-modulation period plane. Based on the similarity of the modulation envelopes, basically every star can be assigned to one of six morphological classes. The double modulation was found in 25 per cent of the studied stars. Only 6.3 per cent of modulated stars belong to the Oosterhoff group II.
ER  -

SKARKA, Marek; Z. PRUDIL a J. JURCSIK. Blazhko effect in the Galactic bulge fundamental mode RR Lyrae stars - II. Modulation shapes, amplitudes, and periods. \textit{Monthly Notices of the Royal Astronomical Society}. Malden: Wiley, 2020, roč.~494, č.~1, s.~1237-1249. ISSN~0035-8711. Dostupné z: https://doi.org/10.1093/mnras/staa673.

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